OEM 2005 Buick Terraza A/C Expansion Valve

2005 Buick Terraza Parts Questions & Experts Answers

• Q: How to Replace an A/C Expansion Valve on 2005 Buick Terraza?

  A: The first step to change the A/C Expansion Valve (TXV) requires using the halogen leak detector (J 39400-A) to recover refrigerant from the a/c system while immediately covering Evaporator inlet and outlet tubes with caps or tape to prevent contamination. First relocate heater hoses when required and then you can disconnect the Evaporator tube block from the A/C Expansion Valve nut before removing the Evaporator inlet and outlet tube block from the A/C Expansion Valve. The Evaporator inlet tube needs to be removed from the outlet tube while discarding any sealing washers present. After applying caps or tape to the Evaporator inlet and outlet tubes you can take out the A/C Expansion Valve from the Evaporator core by removing the A/C Expansion Valve to Evaporator bolts and discarding the A/C Expansion Valve sealing washers. Install new sealing washers onto the Evaporator core before installing the A/C Expansion Valve while tightening the A/C Expansion Valve to Evaporator bolts to 3.2 n.m (28 lb in). After removing tape or caps from Evaporator inlet and outlet tubes users should install new sealing washers before joining the Evaporator inlet to outlet tubing. After connecting the Evaporator inlet and outlet tubes to the A/C Expansion Valve you can put the tube block onto the A/C Expansion Valve nut while tightening its bolts to 16 n.m (12 lb ft). The evacuation of a/c systems follows by recharging the system and testing of fittings using the halogen leak detector (J 39400-A).